JPS54132625A - Preparation of gamma-type quinacridone - Google Patents

Preparation of gamma-type quinacridone

Info

Publication number
JPS54132625A
JPS54132625A JP3926178A JP3926178A JPS54132625A JP S54132625 A JPS54132625 A JP S54132625A JP 3926178 A JP3926178 A JP 3926178A JP 3926178 A JP3926178 A JP 3926178A JP S54132625 A JPS54132625 A JP S54132625A
Authority
JP
Japan
Prior art keywords
quinacridone
water
dimethyl sulfoxide
caustic alkali
crude
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP3926178A
Other languages
Japanese (ja)
Other versions
JPS558547B2 (en
Inventor
Katsuya Shibata
Motohiro Hamada
Eiji Iwamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tosoh Corp
Original Assignee
Toyo Soda Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Soda Manufacturing Co Ltd filed Critical Toyo Soda Manufacturing Co Ltd
Priority to JP3926178A priority Critical patent/JPS54132625A/en
Priority to US06/024,368 priority patent/US4247696A/en
Priority to GB7910825A priority patent/GB2021134B/en
Priority to CH291479A priority patent/CH641823A5/en
Priority to DE19792913007 priority patent/DE2913007A1/en
Publication of JPS54132625A publication Critical patent/JPS54132625A/en
Publication of JPS558547B2 publication Critical patent/JPS558547B2/ja
Granted legal-status Critical Current

Links

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  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

PURPOSE: To purify and to pulverize crude guinacridone simultaneously, and to obtain γ-type crystal of quinacridone with ease and industrially, by dissolving crude quinacridone in dimethyl sulfoxide in the presence of a caustic alkali and water, followed by nentralizing the alkaki with a mineral acid.
CONSTITUTION: Crude quinacridone of any crystalline phase is dissolved in dimethyl sulfoxide preferably in an amount of 4W20 times as much as quinacridone in the presence of a caustic alkali and water. The solution thus obtained is neutalized with a minel acid, e.g., sulfuric acid (may be diluted with dimethyl sulfoxide or water) to give the desired finely divided particle γ-type quinacridone. The amount of caustic alkali is 1.5W2.5 times as much as moles of quinacridone; that of water, 25W30 wt.% based on dimethyl sulfoxide.
EFFECT: Improved heat and weather resistance.
COPYRIGHT: (C)1979,JPO&Japio
JP3926178A 1978-04-01 1978-04-05 Preparation of gamma-type quinacridone Granted JPS54132625A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP3926178A JPS54132625A (en) 1978-04-05 1978-04-05 Preparation of gamma-type quinacridone
US06/024,368 US4247696A (en) 1978-04-01 1979-03-27 Process for preparing gamma phase quinacridone
GB7910825A GB2021134B (en) 1978-04-01 1979-03-28 Process for preparing gamma phase quinacridone
CH291479A CH641823A5 (en) 1978-04-01 1979-03-29 METHOD FOR PRODUCING THE GAMMA CRYSTAL SHAPE OF CHINACRIDON.
DE19792913007 DE2913007A1 (en) 1978-04-01 1979-03-31 METHOD FOR THE PRODUCTION OF GAMMAPHASE-CHINACRIDONE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3926178A JPS54132625A (en) 1978-04-05 1978-04-05 Preparation of gamma-type quinacridone

Publications (2)

Publication Number Publication Date
JPS54132625A true JPS54132625A (en) 1979-10-15
JPS558547B2 JPS558547B2 (en) 1980-03-04

Family

ID=12548189

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3926178A Granted JPS54132625A (en) 1978-04-01 1978-04-05 Preparation of gamma-type quinacridone

Country Status (1)

Country Link
JP (1) JPS54132625A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118460A (en) * 1984-11-15 1986-06-05 Toyo Soda Mfg Co Ltd Production of pigment composition

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61118460A (en) * 1984-11-15 1986-06-05 Toyo Soda Mfg Co Ltd Production of pigment composition

Also Published As

Publication number Publication date
JPS558547B2 (en) 1980-03-04

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